Discontinued Operations - Income Statement (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Net sales	$ 0.0	$ 0.2
Cost of sales	0.0	0.2
Gross profit	0.0	0.0
Selling and marketing expenses	0.0	0.1
General, administrative and other expenses	1.2	0.6
Operating loss	(1.2)	(0.7)
Interest income, net and other	0.0	(0.3)
Loss from discontinued operations before income taxes	(1.2)	(0.4)
Income tax provision	0.0	0.0
Loss from discontinued operations, net of tax	$ (1.2)	$ (0.4)